Morningstar SureSine Classic 300W Pure Sine Wave Inverter (SI-300-220V) - DC to AC Converter, 12VDC, 220VAC, 50Hz - for Residential, Mobile, and Industrial Solar/Non-Solar Systems

Awesome. Put it underneath in my cubby close to the batteries. Used short lengths of 6 AWG for DC input. Then used Romex to a GFCI, then from there I fed 3 other new outlets in my 5th wheel. I also put a switch in my bedroom so I can turn the SureSine on and off. I can now power my Directv and 3 TV's no problem, all silent.I had a couple of questions, and Morningstar called my back. Very good company.

The inverter failed after two and a half years. When I applied for a warranty return they told me that is only has a two year warranty when a five year warranty is advertised... This is criminal fraud. There are many inverters that are just as efficient for half the price. Getting a warranty return is like pulling teeth. Do not buy Morningstar products.

I used this in a small trailer to provide AC when not connected to shore power. The inverter is silent but it is massive and the recommended wiring is not trivial. However, the inverter works well. I mounted a GFI wall socket and a close by enable switch for the inverter so that I didn't need to put inline switches in the high current path. Note that even if the converter is not enabled, you will get a spark when you connect DC due to initial charging of capacitors. I run a 275 watt dehumidifier from this inverter regularly and even though the inverter is mounted vertically, it does not get very warm.Update after a year: The inverter has been solid and silent. I've run a 275 Watt dehumidifier for a week just for a stress test. Zero issues. On a long trip right now and using this inverter to power laptops, Starlink, and various other AC devices.

I have to admit that I was surprised at how big this inverter is considering that it only puts out 300 Watts. That is OK though. Mount it somewhere and forget about it. So far I have been really happy with this inverter. It has no fan so makes very little noise. They only thing that you can hear is a 60Hz hum coming from it but that is so quiet that you wouldn't be able to hear it if people were whispering near it. It seems to be pretty efficient. I suspect that their efficiency rating that they show is the worst case situation. Mine seems to do better but I don't have data to really back that up. I'm very happy with this inverter.

Nice form and fit. Seems well built. It is too pricey as you do not get a GFCI breaker in it as you do with many others, like Samalex, for less $$$.

I installed this inverter on my RV as part of a solar electrical system for the purpose of boondocking. I leave this on all the time for clocks, Videos, stereo, electric mattress pad. Has worked flawlessly and silently. It is in the forward basement in a fiver, under the bedroom. I used it based on the Handy Bob website, and glad I did. Purchased a new one for a home solar system to run TV, router , and lights during an outage.

WARNING!!! This unit should not be sold in the United States as the voltage does not work on US appliances. It is a scam to charge restocking fees. This same unit has probably been sold dozens of times, only to be returned.

this inverter has been running for a few months on my solar system with no problems, and I would definitely buy it again. The auto sleep/wake mode can be a little finicky with loads around 1amp or 10watts. Sometimes my 9watt cree Led bulb will wake it up, and other times I have to add more load to wake it, but that's right on the edge of it's specified wake/sleep setpoint anyway so to be expected. It doesn't go to sleep while plugged into a killawatt meter. You can also manually wake/sleep with a switch. Overall a great little inverter that keeps chugging away 24/7. This pc is running on it right now, with the room light as well. No need for a 3kw inverter to run some led lights, tv, pc, etc. On a scope, the sine wave output had a little bit of an odd shape, but maybe all sine inverters do. Anyway, this runs everything just fine. -1 star because it annoys me that you can't see the 'AC on' led very easily, but then again once it's up and running you rarely have to look at it.